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   <div id="projectbrief">Algorithms for Scheduling</div>
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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_fbc178c12bd249518b3c0868875b8083.html">algorithm</a></li>  </ul>
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<div class="title">SimulatedAnnealing.java</div>  </div>
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<a href="_simulated_annealing_8java.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="keyword">package </span>algorithm;</div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;</div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="keyword">import</span> java.util.Random;</div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;</div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="keyword">import</span> schedule.JobShopSchedule;</div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="keyword">import</span> schedule.PermutationSchedule;</div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="keyword">import</span> schedule.Schedule;</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="keyword">import</span> schedule.TimedSchedule;</div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="keyword">import</span> afsjava.Tjob;</div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="keyword">import</span> afsjava.Workcenter;</div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno"><a class="code" href="classalgorithm_1_1_simulated_annealing.html">   19</a></span>&#160;<span class="keyword">public</span> <span class="keyword">abstract</span> <span class="keyword">class </span><a class="code" href="classalgorithm_1_1_simulated_annealing.html">SimulatedAnnealing</a> {</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;        <span class="comment">// initial temperature</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;        <span class="keyword">private</span> <span class="keywordtype">double</span> initialTemperature; </div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;        <span class="comment">//final temperature</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;        <span class="keyword">private</span> <span class="keywordtype">double</span> finalTemperature;</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;        <span class="comment">//current temperature</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;        <span class="keyword">private</span> <span class="keywordtype">double</span> currentTemperature;</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;        <span class="comment">// cooling factor</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;        <span class="keyword">private</span> <span class="keywordtype">double</span> alfa;</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;        <span class="comment">// number of iterations at temperature </span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;        <span class="keyword">private</span> <span class="keywordtype">int</span> numberOfIterations;</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;        <span class="comment">//various schedules needed</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"><a class="code" href="classalgorithm_1_1_simulated_annealing.html#a083b73cac5dc558c52b3ce3b904968a4">   37</a></span>&#160;        <span class="keyword">protected</span> <a class="code" href="classschedule_1_1_timed_schedule.html">TimedSchedule</a> <a class="code" href="classalgorithm_1_1_simulated_annealing.html#a083b73cac5dc558c52b3ce3b904968a4">currentSchedule</a>;</div>
<div class="line"><a name="l00038"></a><span class="lineno"><a class="code" href="classalgorithm_1_1_simulated_annealing.html#a6fec3e2ee23aceea636d3c7d30f2f61e">   38</a></span>&#160;        <span class="keyword">protected</span> <a class="code" href="classschedule_1_1_timed_schedule.html">TimedSchedule</a> <a class="code" href="classalgorithm_1_1_simulated_annealing.html#a6fec3e2ee23aceea636d3c7d30f2f61e">candidateSchedule</a>;</div>
<div class="line"><a name="l00039"></a><span class="lineno"><a class="code" href="classalgorithm_1_1_simulated_annealing.html#afc3e385935449bc70fa77c0e20cbb2da">   39</a></span>&#160;        <span class="keyword">protected</span> <a class="code" href="classschedule_1_1_timed_schedule.html">TimedSchedule</a> <a class="code" href="classalgorithm_1_1_simulated_annealing.html#afc3e385935449bc70fa77c0e20cbb2da">bestSchedule</a>;</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;        </div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;        <span class="comment">//aux object to manipulate sequences</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"><a class="code" href="classalgorithm_1_1_simulated_annealing.html#a0362995189a3f3ae79a3a1f7f9134928">   42</a></span>&#160;        <span class="keyword">protected</span> <a class="code" href="classschedule_1_1_schedule.html">Schedule</a> <a class="code" href="classalgorithm_1_1_simulated_annealing.html#a0362995189a3f3ae79a3a1f7f9134928">untimedSchedule</a>;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;</div>
<div class="line"><a name="l00054"></a><span class="lineno"><a class="code" href="classalgorithm_1_1_simulated_annealing.html#a766c1b5d4fc718eb1344d2dbf209866c">   54</a></span>&#160;        <span class="keyword">public</span> <a class="code" href="classalgorithm_1_1_simulated_annealing.html#a766c1b5d4fc718eb1344d2dbf209866c">SimulatedAnnealing</a>(<span class="keywordtype">double</span> initialTemperature,</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;                        <span class="keywordtype">double</span> finalTemperature, <span class="keywordtype">double</span> alfa, <span class="keywordtype">int</span> numberOfIterations,</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;                        <a class="code" href="classafsjava_1_1_workcenter.html">Workcenter</a>[] wkcArray, <a class="code" href="classafsjava_1_1_tjob.html">Tjob</a>[] jobArray) {</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;                super();</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;                this.initialTemperature = initialTemperature;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;                this.finalTemperature = finalTemperature;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;                this.alfa = alfa;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;                this.numberOfIterations = numberOfIterations;</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;                this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a0362995189a3f3ae79a3a1f7f9134928">untimedSchedule</a> = <span class="keyword">new</span> <a class="code" href="classschedule_1_1_schedule.html">Schedule</a>(wkcArray);</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;                this.currentTemperature = initialTemperature;</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;        }</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;        </div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;        </div>
<div class="line"><a name="l00072"></a><span class="lineno"><a class="code" href="classalgorithm_1_1_simulated_annealing.html#a8271fe9bd7f439f898b75ea925283647">   72</a></span>&#160;        <span class="keyword">public</span> <span class="keywordtype">void</span> <a class="code" href="classalgorithm_1_1_simulated_annealing.html#a8271fe9bd7f439f898b75ea925283647">initializeSchedule</a>(<a class="code" href="classafsjava_1_1_tjob.html">Tjob</a>[] jobArray, <a class="code" href="classafsjava_1_1_workcenter.html">Workcenter</a>[] wkcArray){</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;                <span class="comment">// initializes a time schedule</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;                <span class="keywordflow">try</span> {</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;                        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j=0; j &lt; <a class="code" href="classafsjava_1_1_tjob.html">Tjob</a>.<a class="code" href="classafsjava_1_1_tjob.html#a0ac046a03ded70452be81baa16ba504e">getNumberOfJobs</a>(); j++){</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;                                <a class="code" href="classalgorithm_1_1_simulated_annealing.html#a0362995189a3f3ae79a3a1f7f9134928">untimedSchedule</a>.<a class="code" href="classschedule_1_1_schedule.html#ab32602ef686ff09576fff717d9e4f587">addToSchedule</a>(j, 0, 0);</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;                        }</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;                        <a class="code" href="classalgorithm_1_1_simulated_annealing.html#a083b73cac5dc558c52b3ce3b904968a4">currentSchedule</a> = <span class="keyword">new</span> <a class="code" href="classschedule_1_1_job_shop_schedule.html">JobShopSchedule</a>(wkcArray, jobArray, <a class="code" href="classalgorithm_1_1_simulated_annealing.html#a0362995189a3f3ae79a3a1f7f9134928">untimedSchedule</a>);</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;                        <a class="code" href="classalgorithm_1_1_simulated_annealing.html#afc3e385935449bc70fa77c0e20cbb2da">bestSchedule</a> = <span class="keyword">new</span> <a class="code" href="classschedule_1_1_job_shop_schedule.html">JobShopSchedule</a>(wkcArray, jobArray, <a class="code" href="classalgorithm_1_1_simulated_annealing.html#a0362995189a3f3ae79a3a1f7f9134928">untimedSchedule</a>);</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;                } <span class="keywordflow">catch</span> (Exception e) {</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;                        <span class="comment">// TODO Auto-generated catch block</span></div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;                        e.printStackTrace();</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;                }</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        }</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;        </div>
<div class="line"><a name="l00092"></a><span class="lineno"><a class="code" href="classalgorithm_1_1_simulated_annealing.html#a34d56122326efb06acc52315ebd5af1c">   92</a></span>&#160;        <span class="keyword">public</span> <span class="keywordtype">void</span> <a class="code" href="classalgorithm_1_1_simulated_annealing.html#a34d56122326efb06acc52315ebd5af1c">movement</a>(<a class="code" href="classafsjava_1_1_tjob.html">Tjob</a>[] jobArray, <a class="code" href="classafsjava_1_1_workcenter.html">Workcenter</a>[] wkcArray, <span class="keywordtype">int</span> pos1, <span class="keywordtype">int</span> pos2){</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;                </div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;                <span class="keywordflow">try</span> {</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;                        <span class="comment">//swaps jobs</span></div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;                        this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a0362995189a3f3ae79a3a1f7f9134928">untimedSchedule</a>.<a class="code" href="classschedule_1_1_schedule.html#aca26c9cb87acc067fb1237451d7cc158">swapToSchedule</a>(0, 0, pos1, pos2);</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;                        <span class="comment">//creates the candidate schedule from the untimed schedule</span></div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;                        this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a6fec3e2ee23aceea636d3c7d30f2f61e">candidateSchedule</a> = <span class="keyword">new</span> <a class="code" href="classschedule_1_1_job_shop_schedule.html">JobShopSchedule</a>(wkcArray, jobArray, this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a0362995189a3f3ae79a3a1f7f9134928">untimedSchedule</a>);</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;                } <span class="keywordflow">catch</span> (Exception e) {</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;                        <span class="comment">// TODO Auto-generated catch block</span></div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;                        e.printStackTrace();</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;                        System.exit(1);</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;                }</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;                </div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;        }</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;        </div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;</div>
<div class="line"><a name="l00116"></a><span class="lineno"><a class="code" href="classalgorithm_1_1_simulated_annealing.html#abd5bef625c0afb20ac00c099497a71cd">  116</a></span>&#160;        <span class="keyword">public</span> <span class="keywordtype">void</span> <a class="code" href="classalgorithm_1_1_simulated_annealing.html#abd5bef625c0afb20ac00c099497a71cd">run</a>(<a class="code" href="classafsjava_1_1_tjob.html">Tjob</a>[] jobArray, <a class="code" href="classafsjava_1_1_workcenter.html">Workcenter</a>[] wkcArray, <span class="keywordtype">int</span> objectiveFunction)<span class="keywordflow">throws</span> Exception{</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;                                </div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;                <span class="keywordtype">int</span> pos;</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;                <span class="keywordtype">int</span> numberOfJobs = <a class="code" href="classafsjava_1_1_tjob.html">Tjob</a>.<a class="code" href="classafsjava_1_1_tjob.html#a0ac046a03ded70452be81baa16ba504e">getNumberOfJobs</a>();</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;                <span class="comment">//int objectiveFunctionBest =  this.currentSchedule.getObjectiveFunction(objectiveFunction);</span></div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;                <span class="keywordtype">int</span> objectiveFunctionBest =  this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a083b73cac5dc558c52b3ce3b904968a4">currentSchedule</a>.<a class="code" href="classschedule_1_1_timed_schedule.html#a74fe84baffde4ccd4e75ea29e4691717">getMakespan</a>();</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;                <span class="keywordtype">int</span> currentObjectiveFunction = 0;</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;                <span class="keywordtype">int</span> candidateObjectiveFunction = 0;</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;                Random random = <span class="keyword">new</span> Random (0); <span class="comment">//initializes the random generator</span></div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;                <span class="keywordflow">while</span> (this.currentTemperature &gt;= this.finalTemperature){</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;                        </div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;                        <span class="comment">// repeats this cycle</span></div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;                        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> k= 0; k &lt; this.numberOfIterations; k++){</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;                                </div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;                                <span class="comment">//aux variable</span></div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;                                currentObjectiveFunction = this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a083b73cac5dc558c52b3ce3b904968a4">currentSchedule</a>.<a class="code" href="classschedule_1_1_timed_schedule.html#a74fe84baffde4ccd4e75ea29e4691717">getMakespan</a>();</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;                                </div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;                                <span class="comment">//selects a neighbor</span></div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;                                pos = (int) (random.nextDouble()* (numberOfJobs-1));</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;                                </div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;                                <span class="comment">//swaps jobs in positions &quot;pos&quot; and &quot;pos + 1&quot; on the untimed schedule...</span></div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;                                this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a34d56122326efb06acc52315ebd5af1c">movement</a>(jobArray, wkcArray, pos, pos+1);</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;                                </div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;                                candidateObjectiveFunction = this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a083b73cac5dc558c52b3ce3b904968a4">currentSchedule</a>.<a class="code" href="classschedule_1_1_timed_schedule.html#a74fe84baffde4ccd4e75ea29e4691717">getMakespan</a>();</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;                                </div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;                                <span class="comment">//determines if the &quot;move&quot; is made</span></div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;                                <span class="comment">// if the candidate schedule is better than the current schedule, make the move</span></div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;                                <span class="keywordflow">if</span> (candidateObjectiveFunction &lt; currentObjectiveFunction){</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;                                        </div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;                                        <span class="comment">//the candidate becomes the current schedule</span></div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;                                        this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a083b73cac5dc558c52b3ce3b904968a4">currentSchedule</a> = this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a6fec3e2ee23aceea636d3c7d30f2f61e">candidateSchedule</a>;</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;                                        </div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;                                        <span class="comment">// if it is the best schedule so far, update bestSchedule</span></div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;                                        <span class="keywordflow">if</span> (candidateObjectiveFunction &lt; objectiveFunctionBest){</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;                                                <a class="code" href="classalgorithm_1_1_simulated_annealing.html#afc3e385935449bc70fa77c0e20cbb2da">bestSchedule</a> = <a class="code" href="classalgorithm_1_1_simulated_annealing.html#a6fec3e2ee23aceea636d3c7d30f2f61e">candidateSchedule</a>;</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;                                                objectiveFunctionBest = candidateObjectiveFunction;</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;                                        }</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;                                }</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;                                <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;                                        <span class="comment">//the move is valid with a probability</span></div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;                                        <span class="keywordtype">int</span> delta = candidateObjectiveFunction - currentObjectiveFunction;</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;                                        <span class="keywordflow">if</span> (random.nextDouble()&lt; Math.exp(-delta / this.currentTemperature)){</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;                                                this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a083b73cac5dc558c52b3ce3b904968a4">currentSchedule</a> = this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#a6fec3e2ee23aceea636d3c7d30f2f61e">candidateSchedule</a>;</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;                                        }</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;                                } <span class="comment">// else</span></div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;                                </div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;                        }<span class="comment">// for</span></div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;                        </div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;                        <span class="comment">//cooling step</span></div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;                        this.currentTemperature = alfa* this.currentTemperature;</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;                        </div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;                }<span class="comment">// while</span></div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;                </div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;                this.<a class="code" href="classalgorithm_1_1_simulated_annealing.html#afc3e385935449bc70fa77c0e20cbb2da">bestSchedule</a>.<a class="code" href="classschedule_1_1_timed_schedule.html#a1b06b96beb972b0c2e46b7465558b134">printPerformance</a>();</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;                </div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;        }</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;}</div>
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